Abstract
Amongst all biotic factors, weeds pose the most serious threat to successful cotton production. Adoption of conservation agriculture, the evolution of herbicide-resistant weed populations, and the absence of any new herbicide chemistry are allowing weeds to become more destructive and uncontrollable. It is important now to investigate cultural practices (non-chemical) to reduce the pressure on herbicides. Trials were conducted at the Gatton Research Farm of University of Queensland during 2015/16 and 2016/17 to assess the implications of narrow row-spacing (50 cm) in managing weeds in glyphosate-tolerant cotton at different weed-infestation intervals [0, 21, 42, 63, 84 and 154 days after planting (DAP)]. Results revealed that narrow (50 cm) row-spacing (at the same density of planting) was not only beneficial in suppressing weed growth (55% lower) and achieving greater lint yield (26% more) but also made the cotton plants more competitive in the early weed-crop interference compared with wide (100 cm) row-spacing. Consequently, the weed-crop competition period (CWIP) was shorter (42 days after emergence) in narrow row-spaced cotton when compared with wide row-spaced cotton (154 days after emergence). The use of this technology will reduce the reliance on herbicides, which in turn will decrease the development of future herbicide-resistant weed populations.
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Claims 6
Claim · model-written summary
Narrow 50 cm rows lowered weed growth by 55% relative to 100 cm rows.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- narrow (50 cm) row-spacinge0
- Outcome
- weed growthe0
- Direction
- lowere0
- Value
- 55%e0
- Comparator
- wide (100 cm) row-spacinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“narrow (50 cm) row-spacing (at the same density of planting) was not only beneficial in suppressing weed growth (55% lower)”
e1“compared with wide (100 cm) row-spacing”
t0“cotton productivity”
Claim · model-written summary
Narrow 50 cm rows produced 26% more cotton lint yield than 100 cm rows.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- narrow (50 cm) row-spacinge0
- Outcome
- lint yielde0
- Direction
- greatere0
- Value
- 26%e0
- Comparator
- wide (100 cm) row-spacinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“narrow (50 cm) row-spacing (at the same density of planting) was not only beneficial in suppressing weed growth (55% lower) and achieving greater lint yield (26% more)”
e1“compared with wide (100 cm) row-spacing”
t0“cotton productivity”
Claim · model-written summary
Narrow row cotton was more competitive during early weed-crop interference than wide row cotton.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- narrow (50 cm) row-spacinge1
- Outcome
- competitive in the early weed-crop interferencee0
- Direction
- more competitivee0
- Comparator
- wide (100 cm) row-spacinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“made the cotton plants more competitive in the early weed-crop interference compared with wide (100 cm) row-spacing”
e1“narrow (50 cm) row-spacing”
Claim · model-written summary
The weed-crop competition period ended at 42 days after emergence under narrow rows versus 154 days under wide rows.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- narrow row-spacede0
- Outcome
- weed-crop competition period (CWIP)e0
- Direction
- shortere0
- Value
- 42 days after emergencee0
- Qualifier
- 154 days after emergencee0
- Comparator
- wide row-spacede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the weed-crop competition period (CWIP) was shorter (42 days after emergence) in narrow row-spaced cotton when compared with wide row-spaced cotton (154 days after emergence)”
Claim · model-written summary
The authors expect narrow row spacing to reduce reliance on herbicides.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- reduce the reliance on herbicidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of this technology will reduce the reliance on herbicides”
t0“cotton productivity”
Claim · model-written summary
The authors expect reduced herbicide reliance to decrease future herbicide-resistant weed development.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- decrease the development of future herbicide-resistant weed populationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which in turn will decrease the development of future herbicide-resistant weed populations”
t0“cotton productivity”
The same questions in other papers
density · weed · Gossypium hirsutum (cotton)Positive and negative results
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- no effect
- no effect
- negative
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See all 9 papers →density · quality: grain · Gossypium hirsutum (cotton)Positive and negative results
33 papers in the same direction as this paper · 34 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- negative
65 papers more in this group
See all 69 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.